a problem or situation, especially in computer programming, that only happens at the highest or lowe

中文解释

边缘案例（在计算机编程中，只出现在可能值范围的最高或最低端或极端情况下的问题或情况） You may run into an edge case where your program screws up. 你的程序出错的地方可能会出现边缘案例。